Bump the gradle group with 3 updates (#410)

---
updated-dependencies:
- dependency-name: com.amplifyframework:core
  dependency-version: 2.29.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle
- dependency-name: com.amplifyframework:aws-api
  dependency-version: 2.29.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle
- dependency-name: com.amplifyframework:aws-auth-cognito
  dependency-version: 2.29.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle
- dependency-name: com.amplifyframework:aws-api
  dependency-version: 2.29.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle
- dependency-name: com.amplifyframework:aws-auth-cognito
  dependency-version: 2.29.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build.gradle

@@ -2,7 +2,7 @@
 buildscript {
     ext.kotlin_version = '2.2.0'
     ext.retrofitVersion = '3.0.0'
-    ext.amplify_version = '2.28.0'
+    ext.amplify_version = '2.29.0'
 
     repositories {
         google()